package map;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class L15 {
    public List<List<Integer>> threeSum(int[] nums) {
        List<List<Integer>> result = new ArrayList<>();
        Arrays.sort(nums);
        for (int i=0;i<nums.length;i++){
            if (nums[i]>0){
                return result;
            }
            if (i>0 && nums[i]==nums[i-1]){
                continue;
            }
            int left=i+1;
            int right=nums.length-1;
            while (left<right){
                if (nums[i]+nums[left]+nums[right]<0){
                    left++;
                }else if(nums[i]+nums[left]+nums[right]>0){
                    right--;
                }else {
                    result.add(Arrays.asList(nums[i],nums[left],nums[right]));
                    while (right>left && nums[right]==nums[right-1]){
                        right--;
                    }
                    while (right>left && nums[left]==nums[left+1]){
                        left++;
                    }
                    right--;
                    left++;
                }

            }

        }
        return result;

    }

    public static void main(String[] args) {
        int nums[]={-1,0,1,2,-1,-4};
        L15 l15 = new L15();
        List<List<Integer>> lists = l15.threeSum(nums);
        System.out.println(1111);
    }
}
